Lifting-jack.



PATENTE) APR. 17, 190e.

. C. HUPFMAN.

' LIFTING JACK. APLIOATNN FILED 0GT.30, 1905.

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PATENT i'UBLiN, GEORG lA.v

it i/ty'vonoen;

not the United Stetes, residing et Dui in the eounty of Laurens endState of 5' iuieorgie, here invented eertznn new and use i mpro'vernentsin Liftingdeclis and i do reeiere the oilowinv to be i full, clear, ando the invention, such es eneoie .re skilled in the art to which erteinso ineke end use the seme.

. y invention relates to lifting-jacks of the jee, end more perticuiarlyto e bailneed or oep for the Seine, object et the invention is toprovide a end elieient construction which may i red to "ither old or newjacks, so es to p vide `iringij or nntirietion heed or on upon theannie.

f w further ohjee oi the invention is to inipr ve and simplify theronstruotion und op und ehn-ined.

in the noronip wie; drawings, Figure 1 is :i verirnl ee :Erw through nsrreiw piek with in): d hull-hearing head or oep `applied tigri 2 is etop plan View of the ennie. n. horizontal see-- rionni View teken ne 3 3in Fig. 1, and Fig. 4 is n det.. el eeotionel View through nslightly-modi; forni of the invention.

eiierring to the drnwnwgv: in' numeral, 1

to di lotes the screw o1c n n it, sieh has its end working in the tin.Mi opening 1 e suitable hese 2,w'hieh, es elnn is provided with ehand-grip 3. et the upper end of the eerew 1 is e. eyhnerieeienlargement 4, which is formed et its top with e conoentrieneiihdieposed upwerdiy-proje'oting reduced "i or projection 5. The letteris adapted ,ve e rotatable heed or oep 6, which is in me torni of enannuler plate or ring, 'l rough the eentrel opening in Whioh seid steinprojects. This heed or oep 6 ie euported upon entirietionl-heiks 7,Whiehere foularrow around the stern peceetion of Letters Patent.

@einem n n einem so, 1905. `anni No. 285,215.

N n that it, iler/rn C. HUrrM/in, e, i

rie en will he hereinafter.

lamented A@April 3.7, 1906,.

5 sind between the under eide of the heed or oep and the upper eide ofthe enlargement i of the Screw. Washers 8 9 ere preferably interposedbetween the helle and seid parte, sind seid bells are retained inposition by n ring l() und e sleeve ii. The ring Misurrounds the stein5, and the sleeve il is screwed or otherwise secured, et l2, upon the u)per portion ofy the eninrgeinent Li. This sieeve terminates Slightlyeeneeth the top or upper farce of the heed or oep 6. vThe letter isprefernhiy retained in position by n` setseren"13, which engages uthreaded opening in the top'ol' the stein 5 end hee its head Countersunkin n recess ifi, formed in the top of the heed or oep Suitable openingsi5 are provided in the enlargement 4 to .receive e removable lever i6,hy'meone of which the `niet: is operated, es wiil he readily understood.

.lt will he eeen that the foregoing construetion may he Applied to anyserewjeei so es to provide ebelhiieeiring heed or nep upon the seine, orit may he applied to :i new ack when it is manufactured; but when theinill-l hearing heed or oep is ep lied to the jack when it ismanufactured. preferably eniploy the construction sl'iown 1n Fig. fl ofthe drawinx. in thiseonstruotion it will-be seen that the washers 8 t?,the ring i0, and the sleeve 11 l'aire omitted, end the 'peeringbelle nresented in annuler grooves 17, formed in the opposing feces of the heedor cup and the enlargement. The hond or enp is retained in position byhouding the upper end of the stein or projeetion, :is shown :it iii.From the foregoing" description, taken in connection with theneemnpenyingl drawings, the construction and operation ol' liu inrenltionv Will he renflily understood without re quiringf; n more extendedexplaination.

Various changes inthe torni, proportion, end the ,uriner deteiis ofeonetrurtion nini" be reeorted 'to without departing1 frein 55h(-princi-- ple or sacrificing any or lthe sulventnges of this invention.

Having thus described my invention, what I claim es new, and desire toseeure by Letters Patent, is*

A device of the ehera'eter described oomprieing n jack-screw having etone end e eyindrieel enlargement end e reduced oylni drioal stern, e.heed er oep upon seid stem end formed in its top with e circuler recess,e

set-serew n said stem und having itshead l oep and enlaigemnt;substantially es de- 'z'o 'seated in 'seid ecess, bearing-balls arrangedaround yseid stem between said ea end said enlargement, Washersinterpose between seid bearing-bells end said-ce and. energe'- ment, ering surrounding sui stem and e1*- mnged Within the IOW ofbearing-balls, and e sleeve earredrby seidv enlargement and adept ed toreten seld beMng-be11sv between senkt einem' scribed. e y

ln testlmony Wheeo l have hereunto set my hand in pf'ei-sencel of twosubsebng Witmesses. RVIN C. HUFEMAN.

Vttnessee l A. W. Genen, T. (LDU Penn.

